Showing papers by "Vallam Sundar published in 2016"
TL;DR: In this article, the influence of bottom profile configuration in the oscillating water column (OWC) on its hydrodynamic performance was studied in terms of wave amplification factor, wave power absorption coefficient, hydrodynamics efficiency, lip wall pressure ratio, and air pressure ratio.
77 citations
TL;DR: In this article, an improved wave energy potential estimate has been made based on various parameters such as physical site characteristics, environmental conditions and socio-economic regional state, the selection criteria have been suggested.
47 citations
TL;DR: In this paper, a new analytical model is proposed to predict the efficiency of the oscillating system from the field values such as maximum amplitude response (Ymax) and frequency ratio (f*).
34 citations
01 Feb 2016
TL;DR: In this article, the authors investigated the sloshing of fluid in an enclosed tank due to regular excitation in the horizontal, vertical and rotational modes through a numerical model, where the external excitations, including rotational oscillation, are built-in within the kinematic and dynamic free surface boundary conditions.
Abstract: The sloshing of fluid in an enclosed tank due to regular excitation in the horizontal, vertical and rotational modes is investigated through a numerical model. Finite element method with cubic spline and finite difference approximations has been adopted to simulate the fully nonlinear sloshing wave. Herein, the external excitations, including rotational oscillation, are built-in within the kinematic and dynamic free surface boundary conditions. The predictions from the present model are compared with those of Nakayama and Wazhizu due to regular wave excitation in the roll mode, whereas the results from the combined excitations were compared with the results of Chen and Chiang. The sloshing oscillation induced by different combination of tank motions has been subjected to frequency domain analysis. The results exhibited the occurrence of dominant peak at the natural frequencies of the system, irrespective of the excitation frequency for the rotational motion. There is nearly a twofold increase in the peak ...
5 citations
TL;DR: In this paper, the authors proposed a bank-connected series of spurs with locally available construction materials and unskilled labor to protect Mousuni island from coastal erosion and salt water intrusion.
Abstract: The Mousuni Island in West Bengal, India is wide-open to Bay of Bengal. This island by virtue of its location is exposed to river flow as well as wave action. It is thus subjected to severe erosion along its south-western coastal stretch and also significantly affecting agriculture due to seawater inundation. This is due to the lower level of bund crest elevation combined with high water levels during coastal flooding. The most suitable method to arrest the shore erosion and salt water intrusion is to divert the flow gradually toward the deeper section of the channel. To meet this requirement, after carrying out a comprehensive profiling of the existing bund, bank connected series of spurs with locally available construction materials and unskilled labor are proposed. In order to design these spurs, the magnitude and direction of sediment movement along the stretch is estimated. The layout of protection measures is proposed based on a detailed analysis of site conditions and the environmental conditions. ...
2 citations
21 Jun 2016
1 citations